Opto Network Private Limited offers Voice over Internet Protocol True Communicator. Opto Network Private Limited offers Opto Communicator that is a true communicator loaded with rich values adds like Voice mails, SMS, Call Forward and many more. The Voice over Internet Protocol True Communicator is soft phone based on the open standard SIP protocol. With Opto Communicator the user can connect to any server on the public internet or on the local area network.